How come i can have a orgasm with a vibrator and not my bf and he tries so hard and gets jealous because he can't do what the vibrator can?

Lay off the vibrator: You could have desensitized yourself to normal sex by using a vibrator too much. There is no way any guy can compete with 5000 vibrations per second. If that's not the case, you have to do the whole set-up: door locked, candles, music, foreplay, and sex. You may need to be on top. You may have to tell your man what to do. Lastly, the sad fact is that some men simply may not work for you.